*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: #f7f9fc;
            color: #1a2634;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #0077b6;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover,
        a:focus {
            color: #023e8a;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #0b2b3f 0%, #1a4a6b 100%);
            color: #fff;
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: #ffd700;
            text-shadow: 2px 2px 0 #b8860b;
            transition: transform 0.3s;
            display: inline-block;
        }
        .my-logo:hover {
            transform: scale(1.03);
            text-decoration: none;
            color: #ffed4a;
        }
        .my-logo small {
            font-size: 0.7rem;
            display: block;
            color: #b0d4f1;
            font-weight: 400;
            letter-spacing: 1px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.5rem;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #e0f0ff;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: all 0.25s;
            white-space: nowrap;
        }
        .nav-menu a:hover,
        .nav-menu a:focus {
            background: rgba(255, 215, 0, 0.2);
            color: #ffd700;
            text-decoration: none;
        }
        .nav-menu a i {
            margin-right: 0.3rem;
        }
        .breadcrumb {
            background: #e9f0f5;
            padding: 0.6rem 0;
            font-size: 0.85rem;
            border-bottom: 1px solid #d0dde8;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #6c7a8a;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #2a6f97;
        }
        .breadcrumb .current {
            color: #4a5568;
            font-weight: 600;
        }
        main {
            padding: 2rem 0 3rem;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 900;
            color: #0b2b3f;
            margin-bottom: 0.3rem;
            line-height: 1.2;
            letter-spacing: -0.5px;
        }
        h1 .highlight {
            color: #e67e22;
        }
        .subtitle {
            font-size: 1.1rem;
            color: #4a6a7a;
            margin-bottom: 1.8rem;
            border-left: 4px solid #ffd700;
            padding-left: 1rem;
            font-weight: 400;
        }
        .last-updated {
            display: inline-block;
            background: #eef4f8;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #3a5a6a;
            margin-bottom: 1.5rem;
            font-weight: 500;
        }
        .last-updated i {
            margin-right: 0.4rem;
            color: #0077b6;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #1a3a4a;
            margin-top: 2.8rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #ffd700;
            display: inline-block;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1e4a5e;
            margin-top: 2rem;
            margin-bottom: 0.7rem;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #2a5a6e;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
        }
        .content-card {
            background: #fff;
            border-radius: 18px;
            padding: 1.8rem 2rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
            margin-bottom: 2rem;
            transition: box-shadow 0.3s;
        }
        .content-card:hover {
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.07);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        .feature-item {
            background: #f0f7fe;
            border-radius: 14px;
            padding: 1.5rem 1.2rem;
            text-align: center;
            transition: transform 0.3s, background 0.3s;
        }
        .feature-item:hover {
            transform: translateY(-5px);
            background: #e4f0fa;
        }
        .feature-item i {
            font-size: 2.2rem;
            color: #f39c12;
            margin-bottom: 0.6rem;
        }
        .feature-item h4 {
            margin-top: 0.2rem;
            font-size: 1.1rem;
        }
        .feature-item p {
            font-size: 0.95rem;
            color: #3a5a6a;
            margin-bottom: 0;
        }
        .image-wrapper {
            margin: 2rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.08);
            background: #e9f0f5;
        }
        .image-wrapper img {
            width: 100%;
            object-fit: cover;
        }
        .image-wrapper figcaption {
            padding: 0.8rem 1.2rem;
            font-size: 0.9rem;
            color: #3a5a6a;
            background: #f4f9ff;
            font-style: italic;
        }
        .tip-box {
            background: #fef9e7;
            border-left: 6px solid #f1c40f;
            padding: 1.2rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
        }
        .tip-box strong {
            color: #7d6608;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        th {
            background: #1a4a6b;
            color: #fff;
            padding: 0.8rem 1rem;
            text-align: left;
            font-weight: 600;
        }
        td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid #e8edf2;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #f4f9ff;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.5rem 0;
        }
        .interactive-card {
            background: #fff;
            border-radius: 18px;
            padding: 1.8rem 2rem;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
        }
        .interactive-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .interactive-card form {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-top: 1rem;
        }
        .interactive-card input,
        .interactive-card textarea,
        .interactive-card select {
            padding: 0.7rem 1rem;
            border: 1px solid #d0dde8;
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border 0.2s;
            background: #f9fcff;
        }
        .interactive-card input:focus,
        .interactive-card textarea:focus,
        .interactive-card select:focus {
            border-color: #0077b6;
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 119, 182, 0.1);
        }
        .interactive-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .btn {
            background: #0077b6;
            color: #fff;
            border: none;
            padding: 0.7rem 1.5rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.2s;
            font-size: 0.95rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            justify-content: center;
        }
        .btn:hover {
            background: #023e8a;
            transform: translateY(-2px);
            text-decoration: none;
            color: #fff;
        }
        .btn-warning {
            background: #f39c12;
        }
        .btn-warning:hover {
            background: #d68910;
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #d0dde8;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #f1c40f;
        }
        .faq-item {
            border-bottom: 1px solid #e8edf2;
            padding: 1rem 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.1rem;
            color: #1a3a4a;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            padding: 0.3rem 0;
        }
        .faq-question i {
            color: #0077b6;
            transition: transform 0.3s;
        }
        .faq-answer {
            padding-top: 0.5rem;
            color: #3a5a6a;
            line-height: 1.6;
        }
        friend-link {
            display: block;
            background: #e9f0f5;
            padding: 1.5rem 2rem;
            border-radius: 18px;
            margin: 2rem 0 1rem;
        }
        friend-link h3 {
            margin-top: 0;
            font-size: 1.2rem;
        }
        friend-link ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem 1.5rem;
        }
        friend-link li::before {
            content: "🔗 ";
        }
        .site-footer {
            background: #0b2b3f;
            color: #b0d4f1;
            padding: 2rem 0;
            text-align: center;
            font-size: 0.9rem;
        }
        .site-footer .container {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .site-footer a {
            color: #ffd700;
        }
        .site-footer a:hover {
            color: #ffed4a;
        }
        .copyright {
            border-top: 1px solid #1a4a6b;
            padding-top: 1rem;
            margin-top: 0.5rem;
            font-size: 0.85rem;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                background: #0b2b3f;
                padding: 1rem 0;
                border-radius: 0 0 18px 18px;
                margin-top: 0.8rem;
                gap: 0.2rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.7rem 1.2rem;
                border-radius: 0;
                width: 100%;
                text-align: left;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .interactive-section {
                grid-template-columns: 1fr;
            }
            .content-card {
                padding: 1.2rem 1.2rem;
            }
            .interactive-card {
                padding: 1.2rem 1.2rem;
            }
            .feature-grid {
                grid-template-columns: 1fr 1fr;
            }
            .header-inner {
                align-items: center;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo small {
                font-size: 0.6rem;
            }
        }
        @media (max-width: 480px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .breadcrumb ol {
                font-size: 0.75rem;
            }
            .container {
                padding: 0 0.8rem;
            }
        }
        .eeat-badge {
            display: flex;
            gap: 1.2rem;
            flex-wrap: wrap;
            background: #eef4f8;
            padding: 0.8rem 1.5rem;
            border-radius: 12px;
            font-size: 0.85rem;
            color: #2a4a5a;
            margin: 1.5rem 0;
            align-items: center;
        }
        .eeat-badge i {
            color: #0077b6;
            font-size: 1.1rem;
        }
        .eeat-badge span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .anchor-offset {
            scroll-margin-top: 100px;
        }